Power generating wind turbine

Abstract

A power generating wind turbine includes parts and components installed in or on a nacelle which are made smaller and lighter, thus facilitating maintenance. A main shaft 11 , a gear-box for speeding up rotation of the main shaft 11 and a generator 13 driven by an output of the gear-box 11 are provided on a nacelle bed plate 6 . The main shaft 11 is connected to an input shaft 12 a end of the gear-box 12 via a double-row tapered roller bearing 16 . The main shaft 11 is supported to a wall portion W 1 of the nacelle bed plate 6 with the double-row tapered roller bearing 16 being interposed therebetween. The main shaft 11 is formed in an annular shape having its outer diameter D 1 larger than its axial directional length L 1.

1. A power generating wind turbine comprising:
 a nacelle supported by a tower; 
 a main shaft connected to a wind turbine rotating blade at a front side of a wall portion of said nacelle; 
 a generator housed within said nacelle; and 
 a gear-box for increasing a rotational speed of an output shaft of said gearbox to drive said generator, said gear-box being housed within said nacelle, 
 wherein said main shaft is connected to an input shaft of said gear-box, and said main shaft is supported by said wall portion of said nacelle via a single double-row tapered roller bearing provided coaxially with said main shaft, said single double-row tapered roller bearing being positioned at the front side of said wall portion and at an axial end portion of said main shaft. 
 
     
     
       2. A power generating wind turbine according to  claim 1 , wherein said main shaft has an annular or disk shape and an outer diameter of said main shaft is larger than an axial directional length of said main shaft. 
     
     
       3. A power generating wind turbine according to  claim 2 , wherein said main shaft and said input shaft of said gear-box are connected to each other via a coupling. 
     
     
       4. A power generating wind turbine according to  claim 1 , wherein said main shaft and said input shaft of said gear-box are connected to each other via a coupling. 
     
     
       5. A power generating wind turbine comprising:
 a nacelle supported by a tower; 
 a main shaft connected to a wind turbine rotating blade at a front side of a wall portion of said nacelle; 
 a generator housed within said nacelle; and 
 a gear-box for increasing a rotational speed of an output shaft of said gearbox to drive said generator, said gear-box being housed within said nacelle, 
 wherein said main shaft is connected to an input shaft of said gear-box, and said main shaft is supported by said wall portion of said nacelle via a single three-row roller bearing provided coaxially with said main shaft, said single three-row roller bearing having a first row of rollers for receiving a radial load and second and third rows of rollers for receiving a thrust load, said single three-row roller bearing being positioned at the front side of said wall portion and at an axial end portion of said main shaft. 
 
     
     
       6. A power generating wind turbine according to  claim 5 , wherein said main shaft has an annular or disk shape and an outer diameter of said main shaft is larger than an axial directional length of said main shaft. 
     
     
       7. A power generating wind turbine according to  claim 6 , wherein said main shaft and said input shaft of said gear-box are connected to each other via a coupling. 
     
     
       8. A power generating wind turbine according to  claim 5 , wherein said main shaft and said input shaft of said gear-box are connected to each other via a coupling.